104 citations · 2k across the 128 of their papers we have counts for
129 papers
Circular orbits and particle collisions in the space-time of boson stars and their frozen states
Maria Chivers, Betti Hartmann, Katherine Horton +1
In this paper, we discuss the dynamics of test particles in the space-time of spherically symmetric, charged boson stars and their frozen states. These latter objects consist of a…
Circular orbits and particle collisions close to charged black holes surrounded by scalar clouds
Maria Chivers, Betti Hartmann, Katherine Horton +1
We study the motion of massive (un)charged test particles in space-times of electric and dyonic black holes which carry scalar hair. We determine the stable and unstable circular o…
Photon rings and shadows of Kerr black holes immersed in a swirling universe
Rogério Capobianco, Betti Hartmann, Jutta Kunz +2
We discuss photon rings around as well as shadows of Kerr black holes immersed in a swirling spacetime (KBHSU). We find that the spin-spin interaction between the angular momentum…
Frozen states of charged boson stars
Yves Brihaye, Betti Hartmann
In this paper, we study frozen states of charged boson stars. These solutions are globally regular and exist in a U(1) gauged scalar field model minimally coupled to gravity for su…
Hairy charged black holes in a model with bounded scalar field potential
Yves Brihaye, Betti Hartmann, Katherine Horton
Electrically and magnetically charged (a.k.a. dyonic) black holes with scalar hair have recently been constructed for a sextic scalar field potential. Here, we re-investigate this…
Boson stars and black holes with (complex and) real scalar hair
Yves Brihaye, Fabien Buisseret, Betti Hartmann +1
We discuss boson stars and black holes with scalar hair in a model where the complex scalar field forming the boson star and the hair on the black hole, respectively, interacts wit…